gh-135676: Simplify docs on lexing names#140464
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Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Blaise Pabon <blaise@gmail.com> Co-authored-by: Micha Albert <info@micha.zone> Co-authored-by: KeithTheEE <kmurrayis@gmail.com>
willingc approved these changes Oct 22, 2025
Doc/reference/lexical_analysis.rst Outdated
| This means that, for example, some typographic variants of characters are | ||
| converted to their "basic" form, for example:: | ||
| >>> nᵘₘᵇₑʳ = 3 |
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It would be helpful to add an explicit comment that the normalized form of nᵘₘᵇₑʳis number.
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encukou commented Nov 5, 2025
There was an insightful conversation in #140269. I'll update this PR to make things even clearer. |
willingc approved these changes Nov 10, 2025
willingc approved these changes Nov 19, 2025
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encukou commented Nov 20, 2025
Thank you for the review! @malemburg, do you also want to take a look? |
encukou merged commit 2ff8608 into python:main 36 checks passed
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Thanks @encukou for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14. |
Sorry, @encukou, I could not cleanly backport this to |
GH-142015 is a backport of this pull request to the 3.14 branch. |
StanFromIreland added a commit to StanFromIreland/cpython that referenced this pull request Nov 27, 2025
This simplifies the Lexical Analysis section on Names (but keeps it technically correct) by putting all the info about non-ASCII characters in a separate (and very technical) section. It uses a mental model where the parser doesn't handle Unicode complexity “immediately”, but: - parses any non-ASCII character (outside strings/comments) as part of a name, since these can't (yet) be e.g. operators - normalizes the name - validates the name, using the xid_start/xid_continue sets (cherry picked from commit 2ff8608) Co-authored-by: Petr Viktorin <encukou@gmail.com> Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Blaise Pabon <blaise@gmail.com> Co-authored-by: Micha Albert <info@micha.zone> Co-authored-by: KeithTheEE <kmurrayis@gmail.com>
encukou added a commit that referenced this pull request Dec 3, 2025
This simplifies the Lexical Analysis section on Names (but keeps it technically correct) by putting all the info about non-ASCII characters in a separate (and very technical) section. It uses a mental model where the parser doesn't handle Unicode complexity “immediately”, but: - parses any non-ASCII character (outside strings/comments) as part of a name, since these can't (yet) be e.g. operators - normalizes the name - validates the name, using the xid_start/xid_continue sets (cherry picked from commit 2ff8608) Co-authored-by: Petr Viktorin <encukou@gmail.com> Co-authored-by: Blaise Pabon <blaise@gmail.com> Co-authored-by: Micha Albert <info@micha.zone> Co-authored-by: KeithTheEE <kmurrayis@gmail.com>
StanFromIreland added a commit to StanFromIreland/cpython that referenced this pull request Dec 6, 2025
This simplifies the Lexical Analysis section on Names (but keeps it technically correct) by putting all the info about non-ASCII characters in a separate (and very technical) section. It uses a mental model where the parser doesn't handle Unicode complexity “immediately”, but: - parses any non-ASCII character (outside strings/comments) as part of a name, since these can't (yet) be e.g. operators - normalizes the name - validates the name, using the xid_start/xid_continue sets Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com> Co-authored-by: Blaise Pabon <blaise@gmail.com> Co-authored-by: Micha Albert <info@micha.zone> Co-authored-by: KeithTheEE <kmurrayis@gmail.com>
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This simplifies the Lexical Analysis section on Names (but keeps it technically correct) by putting all the info about non-ASCII characters in a separate (and very technical) section.
It uses a mental model where the parser doesn't handle Unicode complexity “immediately”, but:
id_start/id_continuesets (referred to in previous sections as “letter-like” and “number-like” characters, with a link to the details)This also means we don't need
xid_start/xid_continueto define the behaviour :)📚 Documentation preview 📚: https://cpython-previews--140464.org.readthedocs.build/